The answer to 'how much to replace smoke detector in Illinois' is that the cost can vary significantly depending on factors like the type of smoke detector, whether it's a hardwired or battery-operated model, and the labor required for installation. Generally, you can expect to pay anywhere from $20 to $100 per smoke detector, plus any additional labor costs.
The price range is wide because smoke detectors come in different technologies, features, and quality levels. Basic battery-powered models may cost $20-$40, while more advanced hardwired detectors with additional safety features can cost $50-$100 or more. The labor to replace an existing detector is usually $50-$100 or more, depending on the complexity of the job. Getting quotes from local electricians or home services providers is essential to determine the exact cost for your specific needs.